EP3243577A2 - Umformeinheit für eine profilierungsanlage - Google Patents

Umformeinheit für eine profilierungsanlage Download PDF

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Publication number
EP3243577A2
EP3243577A2 EP17169403.7A EP17169403A EP3243577A2 EP 3243577 A2 EP3243577 A2 EP 3243577A2 EP 17169403 A EP17169403 A EP 17169403A EP 3243577 A2 EP3243577 A2 EP 3243577A2
Authority
EP
European Patent Office
Prior art keywords
section
rollers
forming unit
units
machine line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17169403.7A
Other languages
English (en)
French (fr)
Other versions
EP3243577B1 (de
EP3243577A3 (de
Inventor
Gianluca Alberini
Luciano Micali
Fabio Barbolini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fives Oto SpA
Original Assignee
Fives Oto SpA
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Filing date
Publication date
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Publication of EP3243577A2 publication Critical patent/EP3243577A2/de
Publication of EP3243577A3 publication Critical patent/EP3243577A3/de
Application granted granted Critical
Publication of EP3243577B1 publication Critical patent/EP3243577B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/10—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
    • B21D5/12—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams

Definitions

  • the present invention relates to a forming unit and a profiling machine line for realising profiled elements.
  • a profiling machine line substantially enables production of longitudinally welded tubes, which are obtained by progressively bending a steel strip about a longitudinal axis, up to bringing the longitudinal edges of the strip into reciprocal contact. The longitudinal edges are welded together to obtain a tube. The tube is cut into sections of a pre-established length, according to known processes. The whole production is performed in a continuous line.
  • a profiling machine line substantially comprises a series of forming units, arranged in succession, each of which comprises at least two profiling rollers. These forming units are predisposed for progressively bending the steel strip about a longitudinal axis thereof until they confer thereon a tubular conformation. The bending of the sheet is done by passing the strip itself between the rollers of the various forming units which, by contact, progressively deform it. The strip slides continuously through the forming units, being progressively deformed.
  • a profiling machine line generally comprises at least an initial forming section along which the strip from which the tubes will be obtained is progressively deformed from a flat conformation to one having a U-shaped bend.
  • This deformation is obtained by pairs of rollers, associated to each forming unit, formed by a roller having a concave outer surface and a roller having a convex outer surface.
  • the radii of curvature of the two rollers are substantially equal.
  • the rollers typically have a horizontal rotation axis. The radii of curvature of the rollers progressively diminish from the start to the end of the forming section, so as to progressively reduce also the radius of curvature of the strip.
  • the rollers of the final zone of the forming section thus have a significant difference between the diameter of the central part thereof and the diameter of the ends thereof.
  • the ends of the concave rollers and the central portion of the convex rollers have rather large diameters, and overall take on a large and unwieldy conformation, as well as being expensive.
  • the object of the present invention is to provide a forming unit for a profiling machine line which allows the drawbacks summarized above to be obviated.
  • An advantage of the forming unit according to the present invention is that it enables a considerable reduction in the diameter of the rollers, thus further enabling a reduction in weight and dimensions thereof.
  • a further advantage of the forming unit according to the present invention is that it can be integrated in already-existing lines.
  • a further aim of the present invention is to provide a profiling machine line that is particularly advantageous with respect to currently-available lines.
  • the profiling machine line guides the starting strip in advancement along a generally horizontal advancement direction (Y).
  • the starting strip is progressively bent in an upwards curve about a longitudinal axis thereof, assuming a tubular conformation in which the two longitudinal edges (E1, E2) are placed alongside one another and welded.
  • the starting strip is for convenience indicated as a "profiled element” starting from when deformation thereof begins, by curving upwards about its own longitudinal axis.
  • the longitudinal edges (E1, E2) of the starting strip are, being welded together, in the upper part of the profiled element (P).
  • the progressive curving of the strip about its own longitudinal axis preferably occurs in an upwards direction, i.e. by lifting the longitudinal edges (E1,E2) and placing them alongside one another in the upper part of the profiled element (P), as schematically illustrated in figure 1a .
  • This allows simplification of the welding operations and subsequent removal of the weld bead, which can take place, still on the processing line, substantially above the profiled element (P) itself.
  • This does not exclude the possibility that the progressive curving of the strip about its own longitudinal axis can take place in a downwards direction, i.e. by lowering the longitudinal edges (E1, E2) and placing them alongside one another in the lower part of the profiled element (P).
  • the profiling machine line comprises a plurality of working units (10,2a,2b,2c,3a,3b,3c,...) each of which is provided with two or more rollers profiled and arranged so as to produce, on the profiled element (P), a certain curvature about the longitudinal axis thereof.
  • the operating principle of the various working units and the way in which they produce the overall curvature of the profiled element (P) are widely known to a person skilled in the sector.
  • the profiling machine line has a forming section (1), comprising a plurality of forming units (10) aligned along a first longitudinal direction (Y1).
  • the forming units (10) by means of two or more profiled rollers, produce the initial deformation of the strip, taking it from the flat conformation to a curved conformation, substantially a U-shape, with the concavity thereof facing upwards.
  • the forming section (1) is followed by a finishing section (2) which comprises a plurality of finishing units (2a,2b,2c,%) aligned along a second longitudinal direction (Y2), substantially coplanar to the longitudinal direction (Y1).
  • the finishing units by means of a plurality of profiled rollers, continue with the deformation of the strip, processing it into a substantially tubular conformation with the lateral edges parallel and close to one another.
  • the finishing section is in turn followed by a guide section (3) that comprises a plurality of guide units (3a,3b,3c,%), aligned to one another.
  • the guide units guide the strip, now closed in a tubular configuration, to welding means (4), predisposed to perform a welding of the longitudinal edges of the strip.
  • the guide units (3a,3b,3c,...) comprise a plurality of profiled rollers.
  • the starting strip advances along the advancement direction (Y) changing its conformation from substantially flat to tubular, due to the effect of the action exerted along the various sections (1, 2, 3) by the working units (10,2a,2b,2c,3a,3b,3c).
  • At least a forming unit (10), illustrated in figures 2 and 3 comprises a plurality of profiled lower rollers (11,12,13) having outer surfaces which envelop, on at least a transversal section plane (S), a lower curve (P1).
  • the outer surfaces of the lower rollers (11,12,13) envelop a continuous lower curve (P1), i.e. they envelop a lower curve (P1) without any interruptions.
  • the transversal section plane is the plane on which the rotation axes of the lower rollers (11,12,13) lie.
  • the lower curve (P1) preferably has concavities facing upwards.
  • the predisposing of a plurality of lower rollers (11,12,13) enables obtaining the lower curve (P1), by reducing the maximum diameter required for obtaining the desired curve.
  • the lower curve (P1) can be obtained only by configuring a roller provided with a maximum diameter in the end zone that is decidedly larger.
  • the lower rollers (11,12,13) can be realised with more modest dimensions.
  • the lower rollers (11,12,13) comprise a central roller (11) that exhibits a concave outer surface.
  • the central roller (11) has a minimum external diameter at a central zone and a maximum external diameter in the end zones.
  • the central roller (11) can be motorised.
  • the lower rollers can comprise one or more lateral rollers (12,13) each of which is provided with a concave outer surface.
  • the concave outer surface of the lateral rollers (12,13), on the transversal section plane, is connected to the outer surface of the central roller (11), so as substantially to define a continuous lower curve (P1).
  • the lateral rollers (12, 13) have rotation axes that are inclined with respect to the rotation axis of the central roller (11). In the illustrated embodiment the rotation axes of the lateral rollers (12, 13) diverge in a distancing direction from the central roller (11).
  • At least a forming unit (10) comprises a plurality of upper rollers (21,22,23,24,25) shaped with outer surfaces that envelop, on the transversal section plane, an upper curve (P2).
  • the upper curve (P2) is preferably parallel to the lower curve (P1), i.e. the upper rollers (21,22,23,24,25) are tangential to a curve coinciding with the lower curve (P1).
  • the transversal section plane is the plane on which the rotation axes of the upper rollers (21,22,23,24,25) lie.
  • the upper curve (P2) preferably has concavities facing upwards.
  • the predisposing of a plurality of upper rollers enables obtaining the upper curve (P2), reducing the maximum diameter required for obtaining the desired curve.
  • the upper curve (P2) can be obtained only by configuring a roller provided with a maximum diameter in the central zone that is decidedly larger.
  • the upper rollers (21,22,23,24,25) can be realised with more modest dimensions.
  • the upper rollers comprise a central roller (21) that exhibits a convex outer surface.
  • the central roller (21) has a barrel-shaped conformation, with a maximum diameter in a central zone.
  • the upper rollers can further comprise one or more lateral rollers (22,23,24,25) which exhibit a convex outer surface.
  • the outer surfaces of the upper rollers (21,22,23,24,25) are substantially tangential to the upper curve (P2) on the transversal section plane.
  • the forming unit (10) comprises a plurality of lower rollers (11,12,13) and a plurality of upper rollers (21,22,23,24,25).
  • the rotation axes of the rollers lie on a same transversal section plane.
  • the upper curve and the lower curve (P2,P1) both lie on the transversal section plane.
  • the upper curve and the lower curve (P2,P1) are substantially parallel to one another.
  • the strip to be processed and bent about the longitudinal axis thereof passes in contact with the lower rollers and the upper rollers, substantially assuming a curvature parallel to the upper curve and the lower curve (P2, P1).
  • the upper rollers (21,22,23,24,25) are associated with an upper support (20), which is movable along a vertical direction. This enables adjusting the distance between the upper rollers and the lower rollers, for example in relation to the thickness of the strip to be processed. This further enables adjusting the pressure that the rollers exert on the strip under process.
  • the upper support (20) has overall a curved conformation, with a concavity facing upwards.
  • the support (20) is further provided with seatings for rotatably housing the upper rollers (21,22,23,24,25).
  • the upper support (20) can be associated to a cross-member (26) which is vertically slidable along a support structure (9). Means known to a person skilled in the sector can be predisposed to command the displacement of the upper support (20).
  • the support structure comprises two uprights (91, 92).
  • the lower rollers (11, 12, 13) can be associated to the uprights (91, 92).
  • the central roller (11) is associated to the uprights at the ends thereof, by means of a shaft or by rotation pins.
  • the lateral rollers (12.13) are each associated to a respective upright.
  • the lower rollers (11, 12, 13) can be associated to a lower support (14).
  • the lower support (14) comprises two portions (14) to each of which is rotatably associated an end of the rotation shaft of the central roller (11).
  • Each support portion (14) further rotatably supports one of the lateral rollers (12, 13).
  • each support portion (14) bears a pair of shelf members (14a) to which the ends of the rotation shaft of the respective lateral roller are associated.
  • the two opposite portions of the lower support (14) are each associated to one of the uprights (91, 92), preferably vertically slidably, for enabling the adjustment of the position of the lower rollers (11,12,13).
  • Means known to a person skilled in the sector can be predisposed to command the vertical displacement of the lower support (14).
  • the profiling machine line can advantageously be provided with at least a working unit (10,2a,2b,2c,3a,3b,3c(7) a position of which is vertically adjustable independently with respect to the other working units.
  • a working unit 10,2a,2b,2c,3a,3b,3c
  • a curvature can be set for the profiled element (P) which is concave facing upwards followed by a curvature that is concave facing downwards.
  • the upper zones of the profiled element (P) are stretched, in particular the zones of the longitudinal edges (E1, E2) which assume a stretched conformation that is substantially free of undulations, or having very modest undulations.
  • the profiling machine line is provided with an intermediate section, comprising one or more working units, which is rotatable about a horizontal axis (X) with respect to a first preceding section, in turn comprising one or more working units.
  • Rotation means can be predisposed to produce this rotation.
  • the line further comprises a third section, comprising one or more working units, which is subsequent with respect to the intermediate section and the position of which on a vertical plane is adjustable.
  • the intermediate section might be provided with a base to which one or more working units are fixed.
  • the base might be hinged about the horizontal axis (X) to a preceding working unit.
  • the finishing section (2) can be rotatable about a horizontal axis (X) relative to the forming section (1). This enables adjusting the inclination of the second longitudinal direction (Y2) relative to the first longitudinal direction (Y1).
  • the finishing section (2) can be inclined upwards (by a few degrees).
  • the profiled element (P) which has by now taken on a tubular configuration, undergoes a bending a concavity of which is facing downwards.
  • the whole zone of the edges (E1, E2) of the profiled element which are to be welded to one another is therefore stretched to assume a stretched conformation that is substantially free of undulations, or has very modest undulations. This significantly facilitates the welding of the longitudinal edges and the realisation of a weld bead that is structurally solid.
  • At least one of the finishing units (2a,2b,2c,...) is rotatable about a horizontal axis (X) relative to the forming section (1).
  • the finishing section (2) comprises a base (B2), to which the finishing units (2a, 2b, 2c, ...) are constrained, which base (B2) is hinged, relative to the horizontal axis (X), to an end portion of the forming section (1).
  • the base (B2) can be hinged to a base portion of the nearest forming unit (10).
  • the forming section (1) can in turn be provided with a base (B1) to which the forming units (10) are associated.
  • a front end of the second base (B2) can be hinged to a rear end of the first base (B1).
  • Actuator means known to the expert in the sector can be used for determining the rotation of the finishing section (2) about the horizontal axis (X).
  • the profiling machine line can advantageously be provided with guide units (3a, 3b, 3c, ...) that are vertically mobile independently of one another.
  • the vertical position of each guide unit can be adjusted independently with respect to the vertical position of the other guide units.
  • This enables giving the transiting profiled element (P) a predetermined curvature on a vertical longitudinal plane thereof.
  • the profiled element (P) a curvature the concavity of which is facing downwards.
  • the whole zone of the edges of the profiled element (P) which are to be welded to one another is therefore stretched to assume a stretched conformation that is substantially free of undulations, or has very modest undulations.
  • the guide units (3a,3b,3c,%) vertically mobile independently of one another, can be present, in the presence or absence of the finishing section (2), rotatable about the horizontal axis (X) with respect to the forming section (1).
  • the vertical position of the guide units (3a,3b,3c,...) can be adjusted so as to bend the profiled element (P) downwards to overall define a continuous curvature with the concavity facing downwards. This produces a consistent stretching of the edges of the profiled element (P) which assume a stretched and straight configuration.
  • the profiling machine line can be provided with guide means (5), interposed for example between the forming section (1) and the finishing section (2), which are so structured as to push the edges (E1, E2) of the profiled element (P) under process one towards the other.
  • the guide means (5) preferably comprise a pair of shoes (51,52), fixed opposite one another, and positioned so as to enter into contact with two opposite zones of the article (P).
  • the shoes (51, 52) are positioned so as to enter into contact with zones close to the edges (E1, E2) of the profiled element (P) under process.
  • the shoes (51, 52) are associated to a foot or support structure and are located at a predetermined height, preferably adjustable.
  • the shoes (51,52) prevalently extend along a longitudinal direction parallel to the advancement direction (Y).
  • the shoes (51, 52) are preferably inclined so as to converge towards one another.
  • the shoes (51, 52) can be positioned for example in a section of the intermediate line between two working units, passing through which the edges (E1, E2) of the profiled element (P) begin to be inclined, turning towards one another. This facilitates the passage from the preceding working unit to the working unit positioned following the shoes (51, 52).
  • the shoes (51, 52) can be positioned between the forming section and the finishing section.
  • the shoes (51, 52) are preferably associated to respective supports (51 a, 52a) that are horizontally and vertically mobile, as schematically illustrated in figure 4 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP17169403.7A 2016-05-10 2017-05-04 Umformeinheit für eine profilierungsanlage Active EP3243577B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUA2016A003295A ITUA20163295A1 (it) 2016-05-10 2016-05-10 Gruppo di formatura per linea profilatrice

Publications (3)

Publication Number Publication Date
EP3243577A2 true EP3243577A2 (de) 2017-11-15
EP3243577A3 EP3243577A3 (de) 2018-01-24
EP3243577B1 EP3243577B1 (de) 2020-02-19

Family

ID=56894127

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17169403.7A Active EP3243577B1 (de) 2016-05-10 2017-05-04 Umformeinheit für eine profilierungsanlage

Country Status (4)

Country Link
US (1) US20170326609A1 (de)
EP (1) EP3243577B1 (de)
JP (1) JP2017202524A (de)
IT (1) ITUA20163295A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11207722B2 (en) * 2018-09-10 2021-12-28 Amsted Rail Company, Inc. Systems and methods for manufacturing a ring from a metal sheet

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2012795A (en) * 1931-09-25 1935-08-27 Republic Steel Corp Method and apparatus for forming heavy gauge pipe blanks from flat metal
GB438790A (en) * 1934-04-23 1935-11-25 Carl Minter Yoder Improved method of and apparatus for producing hollow metal articles of cylindrical form
US2424947A (en) * 1944-12-12 1947-07-29 Fairey Aviat Co Ltd Apparatus for flanging sheet metal strips
DE2608410A1 (de) * 1976-03-01 1977-09-08 Kurt Hirz Einrichtung zum runden von blechstreifen fuer die herstellung von laengsnahtgeschweissten rohren, insbesondere von solchen verhaeltnismaessig grossen durchmessers
IT1296977B1 (it) * 1997-12-16 1999-08-03 Promau Srl Procedimento e macchina per sagomare i bordi di pezzi calandrati
US20130305798A1 (en) * 2012-05-16 2013-11-21 Sungwoo Hitech Co., Ltd. Round bender
JP5908542B2 (ja) * 2014-07-24 2016-04-26 株式会社山陽精機 テーパ鋼管の製造方法及び製造装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
EP3243577B1 (de) 2020-02-19
EP3243577A3 (de) 2018-01-24
US20170326609A1 (en) 2017-11-16
ITUA20163295A1 (it) 2017-11-10
JP2017202524A (ja) 2017-11-16

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